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 * Copyright (c) 2005-2019 The OPC Foundation, Inc. All rights reserved.
 *
 * OPC Foundation MIT License 1.00
 * 
 * Permission is hereby granted, free of charge, to any person
 * obtaining a copy of this software and associated documentation
 * files (the "Software"), to deal in the Software without
 * restriction, including without limitation the rights to use,
 * copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following
 * conditions:
 * 
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
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 * OTHER DEALINGS IN THE SOFTWARE.
 *
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 * ======================================================================*/

using Opc.Ua.Configuration;
using Opc.Ua.Gds.Client;
using System;
using System.Runtime.Serialization;
using System.Threading.Tasks;


namespace Opc.Ua.Gds.Test
{

    public class ServerConfigurationPushTestClient
    {
        public ServerPushConfigurationClient PushClient { get { return _client; } }
        public static bool AutoAccept = false;

        public ServerConfigurationPushTestClient(bool autoAccept)
        {
            AutoAccept = autoAccept;
        }

        public IUserIdentity AppUser { get; private set; }
        public IUserIdentity SysAdminUser { get; private set; }
        public string TempStorePath { get; private set; }
        public ApplicationConfiguration Config { get; private set; }
        public async Task LoadClientConfiguration(int port = -1)
        {
            ApplicationInstance.MessageDlg = new ApplicationMessageDlg();
            ApplicationInstance application = new ApplicationInstance
            {
                ApplicationName = "Server Configuration Push Test Client",
                ApplicationType = ApplicationType.Client,
                ConfigSectionName = "Opc.Ua.ServerConfigurationPushTestClient"
            };

            // load the application configuration.
            Config = await application.LoadApplicationConfiguration(false);

            // check the application certificate.
            bool haveAppCertificate = await application.CheckApplicationInstanceCertificate(true, 0);
            if (!haveAppCertificate)
            {
                throw new Exception("Application instance certificate invalid!");
            }

            Config.CertificateValidator.CertificateValidation += new CertificateValidationEventHandler(CertificateValidator_CertificateValidation);

            ServerConfigurationPushTestClientConfiguration clientConfiguration = application.ApplicationConfiguration.ParseExtension<ServerConfigurationPushTestClientConfiguration>();
            _client = new ServerPushConfigurationClient(application)
            {
                EndpointUrl = TestUtils.PatchOnlyGDSEndpointUrlPort(clientConfiguration.ServerUrl, port)
            };
            if (String.IsNullOrEmpty(clientConfiguration.AppUserName))
            {
                AppUser = new UserIdentity(new AnonymousIdentityToken());
            }
            else
            {
                AppUser = new UserIdentity(clientConfiguration.AppUserName, clientConfiguration.AppPassword);
            }
            SysAdminUser = new UserIdentity(clientConfiguration.SysAdminUserName, clientConfiguration.SysAdminPassword);
            TempStorePath = clientConfiguration.TempStorePath;
        }

        public void DisconnectClient()
        {
            Console.WriteLine("Disconnect Session. Waiting for exit...");

            if (_client != null)
            {
                ServerPushConfigurationClient pushClient = _client;
                _client = null;
                pushClient.Disconnect();
            }

        }

        private static void CertificateValidator_CertificateValidation(CertificateValidator validator, CertificateValidationEventArgs e)
        {
            if (e.Error.StatusCode == StatusCodes.BadCertificateUntrusted)
            {
                e.Accept = AutoAccept;
                if (AutoAccept)
                {
                    Console.WriteLine("Accepted Certificate: {0}", e.Certificate.Subject);
                }
                else
                {
                    Console.WriteLine("Rejected Certificate: {0}", e.Certificate.Subject);
                }
            }
        }

        private ServerPushConfigurationClient _client;

    }

    /// <summary>
    /// Stores the configuration the data access node manager.
    /// </summary>
    [DataContract(Namespace = Opc.Ua.Namespaces.OpcUaConfig)]
    public class ServerConfigurationPushTestClientConfiguration
    {
        #region Constructors
        /// <summary>
        /// The default constructor.
        /// </summary>
        public ServerConfigurationPushTestClientConfiguration()
        {
            Initialize();
        }

        /// <summary>
        /// Initializes the object during deserialization.
        /// </summary>
        [OnDeserializing()]
        private void Initialize(StreamingContext context)
        {
            Initialize();
        }

        /// <summary>
        /// Sets private members to default values.
        /// </summary>
        private void Initialize()
        {
        }
        #endregion

        #region Public
        [DataMember(Order = 1, IsRequired = true)]
        public string ServerUrl { get; set; }
        [DataMember(Order = 2)]
        public string AppUserName { get; set; }
        [DataMember(Order = 3)]
        public string AppPassword { get; set; }
        [DataMember(Order = 4, IsRequired = true)]
        public string SysAdminUserName { get; set; }
        [DataMember(Order = 5, IsRequired = true)]
        public string SysAdminPassword { get; set; }
        [DataMember(Order = 6, IsRequired = true)]
        public string TempStorePath { get; set; }
        #endregion

        #region Private Members
        #endregion
    }
}